Cable joint temperature rise fault monitoring method and device based on temperature difference method

Abstract

The invention relates to a cable joint temperature rise fault monitoring method and device based on a temperature difference method, and the method comprises the following steps: arranging a pluralityof temperature measurement sensors corresponding to a cable joint, and carrying out the sorting; collecting the current environment temperature through a receiving device and sending a temperature measurement instruction to a temperature measurement sensor arranged in a first sequence, and enabling the temperature measurement sensor to collect the three-phase temperature of a cable joint and sendthe three-phase temperature to the receiving device; enabling the receiving device to calculate the temperature difference between every two phases of the cable connector and the temperature difference between the temperature value of each phase of the cable connector and the current environment temperature, and when the temperature difference between every two phases of the cable connector is larger than a preset threshold value or the temperature difference between each phase of the cable connector and the environment temperature is larger than a preset threshold value, judging the temperature rise fault of the cable joint; enabling the receiving device to send the temperature rise fault information of the cable joint to remote equipment; after all subsequent temperature measuring sensors are detected in sequence according to the sequence, detecting the temperature measuring sensor with the first sequence again, and performing circulation in sequence.

Description

technical field [0001] The invention relates to a cable joint temperature rise fault monitoring method and a monitoring device based on a temperature difference method, belonging to the technical field of cable joint temperature rise fault monitoring. Background technique [0002] Due to its simple and reliable structure, the ring main unit has been widely used in distribution stations and outdoor stations in the distribution network at present. It is mainly used in distribution stations of load centers such as urban residential quarters, high-rise buildings, large public buildings, and factories and enterprises. And box-type substations. However, during the operation of the ring network cabinet, there is a high failure rate in the cable accessory joints. The highest failure rate is due to the increase in the temperature of the joints caused by poor contact, which causes severe oxidation of the joints and a sudden reduction in the service life of the cables. Cause cable joi...

AI Technical Summary

Problems solved by technology

However, during the operation of the ring network cabinet, there is a high failure rate in the cable accessory joints. The highest failure rate is due to the increase in the temperature of the joints caused by poor contact, which causes severe oxidation of the joints and a sudden reduction in the service life of the cables. Cause explosion of cable joints, insulation breakdown, burning and other hazards, resulting in large-scale power outages and fire accidents, which will affect the operation of the ring network cabinet itself and the operation safety of the entire power grid

[0003] Existing cable fault monitoring devices are basically limited to monitoring cable faults directly by collecting the temperature of cable joints through sensors, but the accuracy of temperature measurement cannot be guaranteed, and the temperature rise faults of cable joints cannot be accurately monitored. Therefore, the present invention provides a method based on temperature difference The cable joint temperature rise fault monitoring method and monitoring device are used to solve the above problems

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